Thanks, anyways, Riles. I am an audiophile, having been a car audio and home theater installer for about 10 yrs, about 20 yrs ago. I do, in fact, plan on gutting the factory system, using all higher end amps, speakers and adding a few subs in custom enclosures, replacing the false floor cargo area tray organizers found under the carpet and just immediately behind the rear seats. I had a 2013 Santa Fe, traded it in for this new one. The 2013 had a better sound system to be quite honost, and I've given the new system about 6 weeks of "break in" time, and just very disappointed in the current OEM system. I tried the dealership, and the only info they can provide to me are replacement parts numbers, not the actual sizes of speakers or even if and where the processors are located. I know the OEM amp is under the passenger front seat, as that was extremely easy to find. Looks like I'm just going to have to remove all the applicable panels and find out for myself.